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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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    <link rel="stylesheet" href="./my.css">
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<body>
    <p>css引入方式</p>
    <!-- 行内 -->
     <div style="color: blueviolet; font-size: 10px;">这是一个div标签</div>
</body>
</html>